Patents by Inventor Karl-Erik Backius

Karl-Erik Backius has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Wet-chemical digestion of molybdenum sulphide containing material
    Patent number: 4000244
    Abstract: The present invention relates to a special process for the recovery of molybdenum by the wet-chemical digestion of molybdenum sulphide containing materials by means of nitric acid. The invention relates especially to the combination of a leaching procedure (that provides a very pure molybdenum oxide) and a liquid extraction procedure for the recovery of molybdenum and other values from the residual solution that is left over from the leaching procedure.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: December 28, 1976
    Assignee: Molyscand AB
    Inventors: Bengt Olov Pontus Mollerstedt, Karl-Erik Backius